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• W1584126189 abstract "// Kristian W. Pajtler 1,2 , Ellen Mahlow 1 , Andrea Odersky 1 , Sven Lindner 1 , Harald Stephan 1 , Ivo Bendix 3 , Angelika Eggert 4 , Alexander Schramm 1,* and Johannes H. Schulte 1,2,5,6,7,* 1 Department of Pediatric Oncology and Hematology, University Children`s Hospital Essen, Essen, Germany 2 German Cancer Research Center (DKFZ), Heidelberg, Germany 3 Department of Peditrics I/ Neonatology, University Children`s Hospital Essen, Essen, Germany 4 Department of Pediatric Oncology/Hematology, Charité-Universitätsmedizin Berlin, Germany 5 German Cancer Consortium (DKTK), Germany 6 Translational Neuro-Oncology, West German Cancer Center, University Hospital Essen, University Duisburg-Essen, Essen, Germany 7 Centre for Medical Biotechnology, University Duisburg-Essen, Essen, Germany * These authors contributed equally to this work Correspondence: Kristian W. Pajtler, email: // Keywords : Neuroblastoma, NTRK1, Schwann cells, migration, differentiation, NRG1 Received : August 06, 2014 Accepted : October 21, 2014 Published : October 21, 2014 Abstract In neuroblastoma, the most common solid tumor of childhood, excellent prognosis is associated with extensive Schwann cell (SC) content and high-level expression of the neurotrophin receptor, NTRK1/TrkA, which is known to mediate neuroblastoma cell differentiation. We hypothesized that both stromal composition and neuroblastic differentiation are based on bidirectional neuroblastoma-SC interaction. Reanalysis of microarray data from human SY5Y neuroblastoma cells stably transfected with either NTRK1 or NTRK2 revealed upregulation of the mRNA for the SC growth factor, NRG1, in NTRK1-positive cells. Media conditioned by NTRK1-expressing neuroblastoma cells induced SC proliferation and migration, while antibody-based NRG1 neutralization significantly decreased these effects. Vice versa, NRG1-stimulated SC secreted the NTRK1-specific ligand, NGF. SC-conditioned medium activated the NTRK1 receptor in a neuroblastoma cell culture model conditionally expressing NTRK1 and induced differentiation markers in NTRK1-expressing cells. NTRK1 induction in neuroblastoma xenografts mixed with primary SC also significantly reduced tumor growth in vivo. We propose a model for NTRK1-mediated and NRG1-dependent attraction of adjacent SC, which in turn induce neuroblastic differentiation by secretion of the NTRK1-specific ligand, NGF. These findings have implications for understanding the mature and less malignant neuroblastoma phenotype associated with NTRK1 expression, and could assist the development of new therapeutic strategies for neuroblastoma differentiation." @default.
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• W1584126189 date "2014-10-21" @default.
• W1584126189 modified "2023-10-03" @default.
• W1584126189 title "Neuroblastoma in dialog with its stroma: NTRK1 is a regulator of cellular cross-talk with Schwann cells" @default.
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• W1584126189 doi "https://doi.org/10.18632/oncotarget.2611" @default.
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